What it is and what it does
The Siemens 3VA2220-7MS32-0AG0 is a SENTRON molded case circuit breaker (MCCB) in a starter protection design — sized for motor branch circuits where you need coordinated short-circuit and overload protection in one package. Three poles, rated 200 A continuous across the full ambient range from 40 °C up to 70 °C, so no derating headache in a warm enclosure. Interrupting capacity hits 330 kA at 240 V and still holds 242 kA at 415 V and 440 V, which means it clears high-fault conditions on industrial distribution without cascading upstream. At 690 V the rating drops to 5.2 kA — still adequate for most 690 V motor feeders, but worth noting if your fault current is higher.
What the ratings mean for fit
The 200 A frame is the same across the 3VA2 family, but this variant is configured for starter protection — meaning the internal trip curve is tailored for motor inrush and overload profiles, not straight feeder protection. The interrupting range (600 A minimum, 3 000 A maximum) tells you the magnetic trip adjustment band; you set it within that window to coordinate with the downstream contactor or soft starter. The integrated auxiliary switch (1 NO/NC) plus a separate trip alarm switch (HP type) gives you a feedback signal to the PLC or HMI without adding an external accessory block. No undervoltage release, no ground-fault module, no communication — this is a clean, hardwired MCCB for a motor control center bucket.
Panel integration
Footprint: 105 mm wide, 181 mm tall, 86 mm deep. That 86 mm depth is the dimension from the mounting plane to the back of the case — important when you're laying out a shallow enclosure or a gland plate clearance. The 3-pole block mounts on a standard DIN rail or can be screw-fixed to a backplate. The line and load terminals accept busbar or cable lugs; torque specs are on the nameplate. The trip indicator (red flag) is visible through the front cover window, so a quick visual scan during rounds confirms the breaker state without opening the door.